538 rwhp naturally aspirated

ANGREY

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I can tell you this, if P/P is good for 40 rwhp on 93, I'm'a think long and hard about sending mine off to have them done.
 

My94GT

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I can tell you this, if P/P is good for 40 rwhp on 93, I'm'a think long and hard about sending mine off to have them done.
Seriously, if that cars numbers truly represent what’s expected with that head work it is likely damn well worth it. If that’s the case I’m sure that one healthy fun ride on the track.
 

ANGREY

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They deleted my post on the youtube posting and haven't responded to my question on the FB page. Pretty likely that these numbers are STD click bait and not SAE corrected.
 

32vApe

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STD correction still corrects for temp, pressure and humidity. It just corrects to a higher baro and reads about 2% higher than SAE correction. You might be mistaken for uncorrected dyno readings in which no correction factor is applied and will vary widely based on D/A.

Correction Factor Temperature Station Pressure Humidity
J607 60° F 29.92 inHg 0%
J1349 (SAE) 77° F 29.234 inHg 0%
STD 77° F 29.92 inHg 0%
 

ANGREY

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STD correction still corrects for temp, pressure and humidity. It just corrects to a higher baro and reads about 2% higher than SAE correction. You might be mistaken for uncorrected dyno readings in which no correction factor is applied and will vary widely based on D/A.

Correction Factor Temperature Station Pressure Humidity
J607 60° F 29.92 inHg 0%
J1349 (SAE) 77° F 29.234 inHg 0%
STD 77° F 29.92 inHg 0%

The problem is there is no "standard" for std corrections, which is why it's generally used to pump the numbers. There's all sorts of tricks to exaggerate the dyno results if not using SAE correction. Debate about STD aside, MOST people use SAE as the comparison benchmark. Because again, it's consistent (or at least more so than the STD which has numerous versions).
 

32vApe

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On our Dynojet 224xLC, STD is corrected to 29.92 inhg, 77 degrees F, and 0% humidity. The SAE correction is 29.23 inhg, 77 degrees F, and 0% humidity. There are no "tricks" in the software you can play with the STD correction, or for any of the correction factors SAE or DIN. The STD reads about 2% higher because it's correcting to a higher barometric pressure.

The dyno reads an uncorrected number and the software applies what ever correction factor you have selected. There are tricks for inflating dyno numbers that can affect all the correction factors. Overinflating tires, messing with the weather station sensor on the dyno stack, ice on the intake or supercharger, laying fans on open airboxes, etc.
 

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